Older Native American signed shadow box ring with stamped designs on the silver top, signed CP sterling, we think this is Zuni artist Claudine Penketewa, her career began pre-1975; this is an educated guess, there are other artists who also sign with these stamped initials. Pretty turquoise single stone, probably treated. The ring is a size 7 1/2 and the top measures 7/8" long. I has been recently polished by prior owner. Lovely ring, acquired from a collector of fine Native American jewelry. I collect Native American jewelry, especially rings, and when I wear them, I wear four on each hand, meaning 8 rings in all sizes too. And finally my collection has grown too big to keep all of them. A lot of our listings are from my personal collection, all hand selected with care.